even more dramatic, gabby giffords labored yet passion nal plea for passion. >> speaking is difficult but i need to say something important. violence is a big problem. too many children are dying. too many children. we must do something. be bold, be courageous, americans are counting on you. >> reporter: giffords is an advocate and so is her husband mark kelly. >> a strong supporter of the second amendment as anyone on this panel. my wife would not be sitting in this seat, she would not have been sitting here today if we had stronger background checks. >> reporter: at the other end of the table, the other star witness with a very different perspective. >> law-abiding gun owners will not accept blame for the acts of violent or deranged criminals: none of it makes any sense in the real world. >> mr. lapierre, that's the point. the criminals won't go to purchase the guns because there will be a background check. we'll start them from the original purchase. you missed that point completely. and i think it's basic. >> senator, i think you -- >> order. >> reporter: the line to get into this